diff --git a/test/date_format-test.js b/test/date_format-test.js
index d7a6b82..5f7f2ff 100644
--- a/test/date_format-test.js
+++ b/test/date_format-test.js
@@ -1,23 +1,24 @@
+"use strict";
 var vows = require('vows')
 , assert = require('assert')
 , dateFormat = require('../lib/date_format');
 
 vows.describe('date_format').addBatch({
-    'Date extensions': {
-        topic: function() {
-            return new Date(2010, 0, 11, 14, 31, 30, 5);
-        },
-        'should format a date as string using a pattern': function(date) {
-            assert.equal(
-                dateFormat.asString(dateFormat.DATETIME_FORMAT, date),
-                "11 01 2010 14:31:30.005"
-            );
-        },
-        'should default to the ISO8601 format': function(date) {
-            assert.equal(
-                dateFormat.asString(date),
-                '2010-01-11 14:31:30.005'
-            );
-        }
+  'Date extensions': {
+    topic: function() {
+      return new Date(2010, 0, 11, 14, 31, 30, 5);
+    },
+    'should format a date as string using a pattern': function(date) {
+      assert.equal(
+        dateFormat.asString(dateFormat.DATETIME_FORMAT, date),
+        "11 01 2010 14:31:30.005"
+      );
+    },
+    'should default to the ISO8601 format': function(date) {
+      assert.equal(
+        dateFormat.asString(date),
+        '2010-01-11 14:31:30.005'
+      );
     }
+  }
 }).export(module);